[Q] Custom ROM with working microphone?

Hi, I'd like to install a custom ROM on an old A500 but I noticed that the majority of new roms don't have working built-in mic. Can someone suggest a ROM which does? Preferably a Jelly Bean or newer ROM. Out of curiosity, can anyone common on why the mic isn't working on so many roms?

I'm new to this tablet and all the dev that goes with it. I have read up on all the mic issues, and I can't believe there's not one single topic that nails the issue with a solid solution. Seems like drilling a hole, or taking the tab apart to disable the mic is the best way. But there has to be some sort of flash able zip or mic volume controls or something to try

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